Cow Parsnip
Heracleum maximum
From Nearctica
Identification: Plant large, hairy, with a bad smell. Flowers white, in a large, diffuse umbel. Petals notched, sometimes tinted with violet. Stems hollow, up to 2 inches in diameter at the base. Leaves large, palmate, heavily toothed or divided into three segments. Base of leaf expanded, clasping the stem as in celery. Plant 4 to 10 feet in height.
Distribution: Throughout most of North America except the southeastern United States.
Habitat: Cow Parsnip is found on a variety of rich, wet habitats such as moist meadows.
Flowering period: June to August.